<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${fn:indexOf('abcdefg-1234','-' )}
    ${fn:replace('a1b1c1d1','1' ,'2' )}
</body>
</html>
